CA2113301A1 - Outdoor power line having a damping device - Google Patents
Outdoor power line having a damping deviceInfo
- Publication number
- CA2113301A1 CA2113301A1 CA002113301A CA2113301A CA2113301A1 CA 2113301 A1 CA2113301 A1 CA 2113301A1 CA 002113301 A CA002113301 A CA 002113301A CA 2113301 A CA2113301 A CA 2113301A CA 2113301 A1 CA2113301 A1 CA 2113301A1
- Authority
- CA
- Canada
- Prior art keywords
- vibration
- damping
- damping device
- stranded
- power line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000013016 damping Methods 0.000 title claims abstract description 60
- 239000004020 conductor Substances 0.000 claims abstract description 26
- 230000003466 anti-cipated effect Effects 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- KRTSDMXIXPKRQR-AATRIKPKSA-N monocrotophos Chemical compound CNC(=O)\C=C(/C)OP(=O)(OC)OC KRTSDMXIXPKRQR-AATRIKPKSA-N 0.000 description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- XUKUURHRXDUEBC-KAYWLYCHSA-N Atorvastatin Chemical compound C=1C=CC=CC=1C1=C(C=2C=CC(F)=CC=2)N(CC[C@@H](O)C[C@@H](O)CC(O)=O)C(C(C)C)=C1C(=O)NC1=CC=CC=C1 XUKUURHRXDUEBC-KAYWLYCHSA-N 0.000 description 1
- 101100511466 Caenorhabditis elegans lon-1 gene Proteins 0.000 description 1
- 241000202867 Helicops Species 0.000 description 1
- 101100096985 Mus musculus Strc gene Proteins 0.000 description 1
- 241000282341 Mustela putorius furo Species 0.000 description 1
- 241001296096 Probles Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
- Vibration Prevention Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An outdoor power line whose stranded conductors carry damping devices which damp mechanical vibrations of conductors. The damping device has at least two vibration dampers and the spacing between two consecutive vibration dampers is smaller than half of the smallest anticipated wavelength of the mechanical vibration.
An outdoor power line whose stranded conductors carry damping devices which damp mechanical vibrations of conductors. The damping device has at least two vibration dampers and the spacing between two consecutive vibration dampers is smaller than half of the smallest anticipated wavelength of the mechanical vibration.
Description
... , ... . . .. . , .. ~ , .. . .. ..... . ..
J~N 10 '94 ~4:19 p.~/15 - - 2 ~ 1 3 3 ~
.,:~ ...
. ~.. . .
.... ..
OUTDQOR PO~ER ~N~S HAVI~G A DAMPI~ DEVICE
CROSS-RI~ RÉNCE TO REI~TED APPLTCATTON
:,. -' ~his application claims the pr~ority cif Application . .~
P ~300657.~ ~iled in Germany on January 13, 1993, the content ~ :
o~ which is i~corporated herein by re~erenc,e.
, ~
B CKGROUND OF THE I~VENTION ~ ~ ~
:, ~. ~, :
Wind aaUses the stranded conductors of high-voltage outdoor power lines to vibrate mechanicall~ he~e :
~ibration~ axe short-wave vibrations, also ~nown a~ K~-Lrman ~ibratlons, and have frequencies between:5 Hz and 50 Hæ~ The v~brations cause a d~namia reversed bendincr stress in the ~:~
~tranded~ conductorO Support clamp~ or:a~c~oring clamps, in ; : whiah t~ stranded conduotor is secured, axe disposed on pylons. In the region of ~he~uppo~t~, th~ stranded - -:;15 ~ ~on~uctor b~haves as i~ it were tightly cl2Lmped. In this ;;~
~ region::the stranded conduotor is sub~eceed to static tensile :~ 6~res6:~nd bending st~ess. Dynamic and ste~ic s~xesses can :~
ad ~ d~mage or even destruction of the st~nded conductor.
: ~ ~ To protect the s~randed conductor against reversed ~.
~20: bendin~ stress, damping devices ~zLre mountecl on the stranded condu~or. ~hey are attached to~the strancled:cond~ator, near t ~Le 5uppo~ clamps, as is known from Germam Pa~en 565, 334. ; ~
'`' :
JQN 10 '94 14:20 P.3/15 2~133Ql Th~ d~mping device, essentially comprising a ~lngle vibration da~per, i~ thexefore simple to ~ount from the pylon, specificall~ ~he oross arm of the pylon~ The support clamp or a~choring cl~mp acts as a vibration nod~, and serves a~ a point of reference when the dampi~g device i8 mounted. From this reference point the vibration damper can easily be mounted on the stranded conductor at a previously calculated distan~e, 50 hat the damper i~ not located in ~he vibra~i~n node of a mechanical vibration. The damping effect of the o vibration dampe~ is always a function o~ the distance from the reference point.
With a greater span length of the stranded conductor, de~ined by ~he ~pacing o~ two pylons, the two damping devices ~oun~ed i~ the region of the stranded ¢onduotor locat~d near lS the pylons do not have a sufficient damping effect on -mechanical vibrations o~ex the entire stranded condu~tor.
~ns~ead, the damping device only damps the mechanlcal vibrations of a speaific length of the stranded ~onductor. '~
There~ore, ~or greater ~pan lengths, at least one addi~ional da~plng devi~e mu~t be mounted in a ~entral region o~ the .
~t~nded ~onductor. ~owever, no reference point is provided : in th~s centrai reg~on~ Hen~e, the danger is great that the single vibration damper ~ the damping device will be mounted , ~ in a vibration node o~ the stranded conduct.or. .
"''.. '~
.
JRN 10 '94 14:20 P. 4/15 ` :
,, ~
2 1 ~ 3 ~ Q ~ ; :
.. .. .
Unfortunately, the da~ping e~fect o~ the vibration damper is ~;
i~e~eCt~Ve in the vibration node~
The same proble~ arises when damping ~evices are ~ount~d f~om a heli~opter. The damping de~ice cannot b~ mounted near :
5 the pylon~ bec~use the danger is too great there that the helicopter will collide with the pylon. There~or~, when mounted wlth a helicopter, the damping dev~e ls mou~ted to -~
the stranded conductor in a region remote ~rom the pylon.
However, as already e~plained, no re~erence point is provide~
there ~or mounting. ~t is th~s no longer ~ssured that ~he :
device will be protected against ~ibration at all occurring ~ ::
~i~ration ~requencies.
,",~ " ,.....
SUMMA~Y OF THE INVENTION :~
'` .'`: ::,.:, The object of the present inven~ion ic~ t~ avoid the ~: ~
..
~lS ~ above ~rawbacks and ~saure the damping effect of the da~ping ~ ;
~ deYic~/ regardless ~f its ~oun~ing position on the ~tranded `:~
: ~ conductor. ~his o~jeCt i~ attaine~ by providing the power line yith damping devices tnat aan be mounted to the stranded conductors o~ the power line~to damp the mechanical ~ibrations of the strande~:~ondyctor.
In accordance witb the~present invent Lon~ ~he damping ~: device has ~ ~east ~wo vibration dampers, and the ~pacing etween two corlseoutive vibration dampers when they~are ~: :
_ 3 _ ~ ~
JRN 10 ~94 14:Z1 P.s/l5 21133~
mounted on ~he power line is smaller than b.alf o~ the s~allest ant~cipated wavelength of the ~ecb,anical vibration, that is to.say ~he distance a between two ~onsecutive vibration dampers is : .
A",in . ~
~ .
In accordanae with this formula, spaci.ng a be~ween two vibration damper~ i~ selected such that, e~en with the ; ;
smallest anticip~ed wavelength Amin, it never occurs that all o~ the ~brat~on damper~ are simultaneously secured in a .
vibration node. This a~rangement o~ at lea.st ~wo vibration ~10~ dampers replaces t~e vi~ration da~per conv~.n~ionally used alone:at a ~pe¢ific location:of the;s~rand~d conduct~, thuc assuring the dampi~g e~fect of the damping device, regardless o~ ~he di6tan~e ~rom the pylo~. Even i~ the case where a ~ : :
vi~ration damper iq moun~ed in a vi~ration node, in the .
lS damping device of the invention, at least one additional .,: . -vib~ation damper has a damping e~ect. The added costs of ~he additional vibra~ion da~pers~ o~ a damping device are minimal in ~omparison to repair costs and F~ossible eoonomic .- :
JRN 10 '94 14:21 .P.~'15 : -,~ ~
2~ 33~ ~
con~eque~ces o~ a co~ductor break caused by an ineffective dampi~g device.
The damping device of the invention i~ independent of the structural embodiment and precise mode of function o~ the vibra~ion dampers~
The damping effect of the damping device is as~ured with as few as two vi~ration dampers.
- Depending on the degree of e~ectiven~ss, a sin~le :-...:. :- ~i..:
da~ping device or a plurality ~hereof may be provid~d between ~wo pylons (span width or span length) for each tranded conduc~or. . :
The damping device may comprise at least ~hree vibration d~mper~. ln thi~ case it can suffice to mount a sing1e damping device ~o~ each stranded conductort even with large ~ .
span widths, ~o ~u~iciently damp ~echanical vibrations.
Bec~u~e a maximum of one vibration damper t~ three can be in -~
a vibration node beaause of spacing a at :least two vibration dampers are simultaneously active. This d;1mping device thus ~: has the e~ect of two conventional damping devices mounted -~
.
~20 sepa~ately at ~he $wo end regions o~ ~he stranded conductor and ~aving a ~ngle vibration damper each. Th~s embodiment o* the damping device permits moùntinq sol~ly in a single ~ -region of th~ span width. The vibration dampers needed to - da~p stranded condu~tor viPrations~can be mounted adjacently ;;~
~, ', ~, . . .
. .: -.
". ..~
JRN 10 '94 14:2Z . P.7~15 : : , 21133~ -on the str~nded conductor in a simple manner. This saves additional mounting time.
A greate~ number of vibration dampers a~cordingly improves ~he damping e~ect of the damping device, bec~use the vibratio~ energy of the stranded conductor, which must be destroyed, is distributed onto a greater number o vibration damper~. Mounting efforts in this instanc~ ar~
insignifi¢antly inoreased, ~ecause a}l of the vibration da~pers axe mounted in the same region of ~:he stranded ~ -~
condu~tor, and together form a single damping device.
In prActice, a plurality o~ vibration dampers can be provided to achieve a sufPicient damping of mechani~al vibrations, even Por span lengths that span g~eat dis~ances.
Mounting a damping device at an end r~igion is ~est ~5 s~ited for greater span lengths. One damping device is pre~erably ~ounted in each o the two end legions of ~he span length in order to sufiiciently damp mechanical vi~rations. ~;
~he ~election o~ ~he precise mounting position in the end .
~ region is, however~ not a function of the flistance ~rom ~he 20 ~ pylon.
The damping device is suited for heliaopter mounting.
' Thi~ permits convenient mounting of the dampinq devices when the open-ci~uit line is loca~ed in ~egion~ Shat are particularly difficult to reach~ Because o~ the damping ~S~ e~fec~ of the damping device, which is no~ a ~unction of a JQN 10 '94 14:ZZ P.8~15 ' ~ :
i ~, ~p~cific moun~ing position on the stranded çonductor, the helicopter can 1y to an easily accessible region o~ the ~tranded conduc~or ~or mounting. ~he heli~opter does ~ot have to maintain a previou~ly calculated d~stance ~rom the ~ .
pylon. Onl~ the requir~d safety margin be1:ween the : ~ -~elicopter and the stranded conductor is n~3cessary, which Puxthe~ simplif.ies mounting.
Shutting down the power line, which i~ required for ~ounting, is often undesirable or impossib:Le because of the econom~a significance ~f doing so. In the aase of a live stranded conductor, the damping device can be easily mounted ~ :
~O ~he ~tranded condu~tor with the aid o~ ~he helicopter. :~ ~
, '"
BRIEF D~S~RIPTION OF THE p~AWING ~ ~:
. , ~he invention is descri~ed in detail hy way of examples ~ shown in the figures.
Figure l ls~a schematic representation o~ a span with onventional damping devi~es Figures 2 and 3 are fundamental repre~entations of the : ~str~ Med aonductor With nodal points and vibration nodes, and ~`
20 ~ a aonventional damping~dsvice Figure 4 is the representation of the s~randed conductor ~` o~ Figures 2 ~nd 3, but with the damping d~viae of the ::
~: imrention " ~. '' '"' "
.
JhN 10 '94 14:Z3 p. 9/15 21~33~
Figu~e S is ~he representation of the span of Figure 1, but with ~he damping device o~ the inv~ntic.n.
DET~IL~:D DESCRIPq~ION OF THE PPcl~:FERREt) E~5BODIMENT
A stranded conauctor 2 strung between two pylons 1 can ~e seen in Figure 1. Support clamps 3, which are secured to pylons 1 by way of insulators ~, clamp strc~nded conductor 2.
Suppor~ clamps 3 and insulators 4 a~e only shown schematica}ly in Figure 1. ~wo ~onventio~al dampi~g devices :
5 are m~unted on ~tranded conductox 2. The two damping 1~ devices 5 comprise a sin~le vibration damper 6. Damping devices 5 are at~ached in each region of stranded conductor 2 located near a pylon, ~ecause this mounting can easily be executed ~om pylon 1, speci~iaally fro~ a cross arm 7 conneated to pylon 1.: . ; :
~: 15 ~::Should a helicop~er 8 be required:for mounting damping ::
device~5, ~he damping devi~e~5 m~st be mounted in a region o~ otranded conduet4r 2 that i6 remote fro1n a pylon ~o avoid a collision o~ the helicopter rotor and py:Lon 1.
Correct mou~ting o~ damping device 5, which ~mprises~a ~ .
~: ZO single vibratlon damper 6, from pylon l:is shown ~aking place in Figure 2. support cl~mp 3 is shown schem~tically as a seaure clamp end 9. Vibratlon damper 6 is easily~secured to :~ ~ stranded aonductor 2 with~a spacing a~from clamp end 9. In : - 8 - ::~
: . .~
JflN 10 '94 14:Z3 P. 113~15 . ~
2 1 1 3 3 Q ~
thi~ case spacing a is less than ~he half-wave of the ;~
s~alle~t an~i~ipated wavelength, A~jnO Thi~ reliabl~ preve~ts da~ping device 5 from being secured in a v.ibratio~ node.
Becaus~ oX the greater dis~ance be~ween clamp end 9 and the faætening location of damping device 5, i~ is very probable in helicopter-supported mounting ~hat conven~ional damping device 5 will be secured in an occurrin~ mechanical vibration (Figure 3) and thus be ineffeative. - .-~n ao~ordance with the in~e~tio~, damping deviae 5 therefore comprises a plurali~ of vibration dampers 6. In the example of Figure 4, three vibration dampers 6 are provided. ~wo consecutive vibration dampers 6 for each ~ ;
damping device S are secured to stranded conduGtor 2 with above-men~ioned spacing a. Spacing a extends parallel to the longitudinal axis 10 of non-displaced stranded conductor 2.
I~ A vibration dampe~ 6 is now in a vibration node of mechanical ~i~ration, the respective other vibration n damper~s) ~ o~ the s~me damping device is (are) reliably disp~sed outside a vibration node. The damping effect of the.
dam~ing deviae 5 of the invention is thus assured at all anticipa~ed ~requencies of m~chanical vibration of stranded :
cond~kor 2j r~ga~dless o~ the di~tance from clamp end 9.
: : Fig~re~5 shows damping de~ice 5, whic;h comprises three -vib~ation damper~ 6 and which is mounted from a helicopter 8.
;25 ~ a vibration damper 6 were to be in a vi.bration node, two .
_ J~N 10 '94 14:24 P. 11/15 , 3~
vîbratlon dampers 6 ha~ing a damping ef~eck would be present.
They have the same effect as the two vibra~ion dampers conventionally secured at the two end Xegions o~ stranded ..
conduc~r 2 (Figure 1). Damping device 5 of the invention ~Figure 5) thex~ore replaces two conventional, separate damping devices 5 (Figure 1) within speci~ic segments of the span l~ngth. With the use of a single dam2ing device 5 having three vibration dampexs 6, the heli_optex 8 need only ~ly to one region of stranded conductor 2, thus saving ~ounting ~ime.
' " ; "'~ ~
, ''~
,, .. : ~,:
~.:: .,. :
, :,. ~ :: .~ .:
~ .. . :
J~N 10 '94 ~4:19 p.~/15 - - 2 ~ 1 3 3 ~
.,:~ ...
. ~.. . .
.... ..
OUTDQOR PO~ER ~N~S HAVI~G A DAMPI~ DEVICE
CROSS-RI~ RÉNCE TO REI~TED APPLTCATTON
:,. -' ~his application claims the pr~ority cif Application . .~
P ~300657.~ ~iled in Germany on January 13, 1993, the content ~ :
o~ which is i~corporated herein by re~erenc,e.
, ~
B CKGROUND OF THE I~VENTION ~ ~ ~
:, ~. ~, :
Wind aaUses the stranded conductors of high-voltage outdoor power lines to vibrate mechanicall~ he~e :
~ibration~ axe short-wave vibrations, also ~nown a~ K~-Lrman ~ibratlons, and have frequencies between:5 Hz and 50 Hæ~ The v~brations cause a d~namia reversed bendincr stress in the ~:~
~tranded~ conductorO Support clamp~ or:a~c~oring clamps, in ; : whiah t~ stranded conduotor is secured, axe disposed on pylons. In the region of ~he~uppo~t~, th~ stranded - -:;15 ~ ~on~uctor b~haves as i~ it were tightly cl2Lmped. In this ;;~
~ region::the stranded conduotor is sub~eceed to static tensile :~ 6~res6:~nd bending st~ess. Dynamic and ste~ic s~xesses can :~
ad ~ d~mage or even destruction of the st~nded conductor.
: ~ ~ To protect the s~randed conductor against reversed ~.
~20: bendin~ stress, damping devices ~zLre mountecl on the stranded condu~or. ~hey are attached to~the strancled:cond~ator, near t ~Le 5uppo~ clamps, as is known from Germam Pa~en 565, 334. ; ~
'`' :
JQN 10 '94 14:20 P.3/15 2~133Ql Th~ d~mping device, essentially comprising a ~lngle vibration da~per, i~ thexefore simple to ~ount from the pylon, specificall~ ~he oross arm of the pylon~ The support clamp or a~choring cl~mp acts as a vibration nod~, and serves a~ a point of reference when the dampi~g device i8 mounted. From this reference point the vibration damper can easily be mounted on the stranded conductor at a previously calculated distan~e, 50 hat the damper i~ not located in ~he vibra~i~n node of a mechanical vibration. The damping effect of the o vibration dampe~ is always a function o~ the distance from the reference point.
With a greater span length of the stranded conductor, de~ined by ~he ~pacing o~ two pylons, the two damping devices ~oun~ed i~ the region of the stranded ¢onduotor locat~d near lS the pylons do not have a sufficient damping effect on -mechanical vibrations o~ex the entire stranded condu~tor.
~ns~ead, the damping device only damps the mechanlcal vibrations of a speaific length of the stranded ~onductor. '~
There~ore, ~or greater ~pan lengths, at least one addi~ional da~plng devi~e mu~t be mounted in a ~entral region o~ the .
~t~nded ~onductor. ~owever, no reference point is provided : in th~s centrai reg~on~ Hen~e, the danger is great that the single vibration damper ~ the damping device will be mounted , ~ in a vibration node o~ the stranded conduct.or. .
"''.. '~
.
JRN 10 '94 14:20 P. 4/15 ` :
,, ~
2 1 ~ 3 ~ Q ~ ; :
.. .. .
Unfortunately, the da~ping e~fect o~ the vibration damper is ~;
i~e~eCt~Ve in the vibration node~
The same proble~ arises when damping ~evices are ~ount~d f~om a heli~opter. The damping de~ice cannot b~ mounted near :
5 the pylon~ bec~use the danger is too great there that the helicopter will collide with the pylon. There~or~, when mounted wlth a helicopter, the damping dev~e ls mou~ted to -~
the stranded conductor in a region remote ~rom the pylon.
However, as already e~plained, no re~erence point is provide~
there ~or mounting. ~t is th~s no longer ~ssured that ~he :
device will be protected against ~ibration at all occurring ~ ::
~i~ration ~requencies.
,",~ " ,.....
SUMMA~Y OF THE INVENTION :~
'` .'`: ::,.:, The object of the present inven~ion ic~ t~ avoid the ~: ~
..
~lS ~ above ~rawbacks and ~saure the damping effect of the da~ping ~ ;
~ deYic~/ regardless ~f its ~oun~ing position on the ~tranded `:~
: ~ conductor. ~his o~jeCt i~ attaine~ by providing the power line yith damping devices tnat aan be mounted to the stranded conductors o~ the power line~to damp the mechanical ~ibrations of the strande~:~ondyctor.
In accordance witb the~present invent Lon~ ~he damping ~: device has ~ ~east ~wo vibration dampers, and the ~pacing etween two corlseoutive vibration dampers when they~are ~: :
_ 3 _ ~ ~
JRN 10 ~94 14:Z1 P.s/l5 21133~
mounted on ~he power line is smaller than b.alf o~ the s~allest ant~cipated wavelength of the ~ecb,anical vibration, that is to.say ~he distance a between two ~onsecutive vibration dampers is : .
A",in . ~
~ .
In accordanae with this formula, spaci.ng a be~ween two vibration damper~ i~ selected such that, e~en with the ; ;
smallest anticip~ed wavelength Amin, it never occurs that all o~ the ~brat~on damper~ are simultaneously secured in a .
vibration node. This a~rangement o~ at lea.st ~wo vibration ~10~ dampers replaces t~e vi~ration da~per conv~.n~ionally used alone:at a ~pe¢ific location:of the;s~rand~d conduct~, thuc assuring the dampi~g e~fect of the damping device, regardless o~ ~he di6tan~e ~rom the pylo~. Even i~ the case where a ~ : :
vi~ration damper iq moun~ed in a vi~ration node, in the .
lS damping device of the invention, at least one additional .,: . -vib~ation damper has a damping e~ect. The added costs of ~he additional vibra~ion da~pers~ o~ a damping device are minimal in ~omparison to repair costs and F~ossible eoonomic .- :
JRN 10 '94 14:21 .P.~'15 : -,~ ~
2~ 33~ ~
con~eque~ces o~ a co~ductor break caused by an ineffective dampi~g device.
The damping device of the invention i~ independent of the structural embodiment and precise mode of function o~ the vibra~ion dampers~
The damping effect of the damping device is as~ured with as few as two vi~ration dampers.
- Depending on the degree of e~ectiven~ss, a sin~le :-...:. :- ~i..:
da~ping device or a plurality ~hereof may be provid~d between ~wo pylons (span width or span length) for each tranded conduc~or. . :
The damping device may comprise at least ~hree vibration d~mper~. ln thi~ case it can suffice to mount a sing1e damping device ~o~ each stranded conductort even with large ~ .
span widths, ~o ~u~iciently damp ~echanical vibrations.
Bec~u~e a maximum of one vibration damper t~ three can be in -~
a vibration node beaause of spacing a at :least two vibration dampers are simultaneously active. This d;1mping device thus ~: has the e~ect of two conventional damping devices mounted -~
.
~20 sepa~ately at ~he $wo end regions o~ ~he stranded conductor and ~aving a ~ngle vibration damper each. Th~s embodiment o* the damping device permits moùntinq sol~ly in a single ~ -region of th~ span width. The vibration dampers needed to - da~p stranded condu~tor viPrations~can be mounted adjacently ;;~
~, ', ~, . . .
. .: -.
". ..~
JRN 10 '94 14:2Z . P.7~15 : : , 21133~ -on the str~nded conductor in a simple manner. This saves additional mounting time.
A greate~ number of vibration dampers a~cordingly improves ~he damping e~ect of the damping device, bec~use the vibratio~ energy of the stranded conductor, which must be destroyed, is distributed onto a greater number o vibration damper~. Mounting efforts in this instanc~ ar~
insignifi¢antly inoreased, ~ecause a}l of the vibration da~pers axe mounted in the same region of ~:he stranded ~ -~
condu~tor, and together form a single damping device.
In prActice, a plurality o~ vibration dampers can be provided to achieve a sufPicient damping of mechani~al vibrations, even Por span lengths that span g~eat dis~ances.
Mounting a damping device at an end r~igion is ~est ~5 s~ited for greater span lengths. One damping device is pre~erably ~ounted in each o the two end legions of ~he span length in order to sufiiciently damp mechanical vi~rations. ~;
~he ~election o~ ~he precise mounting position in the end .
~ region is, however~ not a function of the flistance ~rom ~he 20 ~ pylon.
The damping device is suited for heliaopter mounting.
' Thi~ permits convenient mounting of the dampinq devices when the open-ci~uit line is loca~ed in ~egion~ Shat are particularly difficult to reach~ Because o~ the damping ~S~ e~fec~ of the damping device, which is no~ a ~unction of a JQN 10 '94 14:ZZ P.8~15 ' ~ :
i ~, ~p~cific moun~ing position on the stranded çonductor, the helicopter can 1y to an easily accessible region o~ the ~tranded conduc~or ~or mounting. ~he heli~opter does ~ot have to maintain a previou~ly calculated d~stance ~rom the ~ .
pylon. Onl~ the requir~d safety margin be1:ween the : ~ -~elicopter and the stranded conductor is n~3cessary, which Puxthe~ simplif.ies mounting.
Shutting down the power line, which i~ required for ~ounting, is often undesirable or impossib:Le because of the econom~a significance ~f doing so. In the aase of a live stranded conductor, the damping device can be easily mounted ~ :
~O ~he ~tranded condu~tor with the aid o~ ~he helicopter. :~ ~
, '"
BRIEF D~S~RIPTION OF THE p~AWING ~ ~:
. , ~he invention is descri~ed in detail hy way of examples ~ shown in the figures.
Figure l ls~a schematic representation o~ a span with onventional damping devi~es Figures 2 and 3 are fundamental repre~entations of the : ~str~ Med aonductor With nodal points and vibration nodes, and ~`
20 ~ a aonventional damping~dsvice Figure 4 is the representation of the s~randed conductor ~` o~ Figures 2 ~nd 3, but with the damping d~viae of the ::
~: imrention " ~. '' '"' "
.
JhN 10 '94 14:Z3 p. 9/15 21~33~
Figu~e S is ~he representation of the span of Figure 1, but with ~he damping device o~ the inv~ntic.n.
DET~IL~:D DESCRIPq~ION OF THE PPcl~:FERREt) E~5BODIMENT
A stranded conauctor 2 strung between two pylons 1 can ~e seen in Figure 1. Support clamps 3, which are secured to pylons 1 by way of insulators ~, clamp strc~nded conductor 2.
Suppor~ clamps 3 and insulators 4 a~e only shown schematica}ly in Figure 1. ~wo ~onventio~al dampi~g devices :
5 are m~unted on ~tranded conductox 2. The two damping 1~ devices 5 comprise a sin~le vibration damper 6. Damping devices 5 are at~ached in each region of stranded conductor 2 located near a pylon, ~ecause this mounting can easily be executed ~om pylon 1, speci~iaally fro~ a cross arm 7 conneated to pylon 1.: . ; :
~: 15 ~::Should a helicop~er 8 be required:for mounting damping ::
device~5, ~he damping devi~e~5 m~st be mounted in a region o~ otranded conduet4r 2 that i6 remote fro1n a pylon ~o avoid a collision o~ the helicopter rotor and py:Lon 1.
Correct mou~ting o~ damping device 5, which ~mprises~a ~ .
~: ZO single vibratlon damper 6, from pylon l:is shown ~aking place in Figure 2. support cl~mp 3 is shown schem~tically as a seaure clamp end 9. Vibratlon damper 6 is easily~secured to :~ ~ stranded aonductor 2 with~a spacing a~from clamp end 9. In : - 8 - ::~
: . .~
JflN 10 '94 14:Z3 P. 113~15 . ~
2 1 1 3 3 Q ~
thi~ case spacing a is less than ~he half-wave of the ;~
s~alle~t an~i~ipated wavelength, A~jnO Thi~ reliabl~ preve~ts da~ping device 5 from being secured in a v.ibratio~ node.
Becaus~ oX the greater dis~ance be~ween clamp end 9 and the faætening location of damping device 5, i~ is very probable in helicopter-supported mounting ~hat conven~ional damping device 5 will be secured in an occurrin~ mechanical vibration (Figure 3) and thus be ineffeative. - .-~n ao~ordance with the in~e~tio~, damping deviae 5 therefore comprises a plurali~ of vibration dampers 6. In the example of Figure 4, three vibration dampers 6 are provided. ~wo consecutive vibration dampers 6 for each ~ ;
damping device S are secured to stranded conduGtor 2 with above-men~ioned spacing a. Spacing a extends parallel to the longitudinal axis 10 of non-displaced stranded conductor 2.
I~ A vibration dampe~ 6 is now in a vibration node of mechanical ~i~ration, the respective other vibration n damper~s) ~ o~ the s~me damping device is (are) reliably disp~sed outside a vibration node. The damping effect of the.
dam~ing deviae 5 of the invention is thus assured at all anticipa~ed ~requencies of m~chanical vibration of stranded :
cond~kor 2j r~ga~dless o~ the di~tance from clamp end 9.
: : Fig~re~5 shows damping de~ice 5, whic;h comprises three -vib~ation damper~ 6 and which is mounted from a helicopter 8.
;25 ~ a vibration damper 6 were to be in a vi.bration node, two .
_ J~N 10 '94 14:24 P. 11/15 , 3~
vîbratlon dampers 6 ha~ing a damping ef~eck would be present.
They have the same effect as the two vibra~ion dampers conventionally secured at the two end Xegions o~ stranded ..
conduc~r 2 (Figure 1). Damping device 5 of the invention ~Figure 5) thex~ore replaces two conventional, separate damping devices 5 (Figure 1) within speci~ic segments of the span l~ngth. With the use of a single dam2ing device 5 having three vibration dampexs 6, the heli_optex 8 need only ~ly to one region of stranded conductor 2, thus saving ~ounting ~ime.
' " ; "'~ ~
, ''~
,, .. : ~,:
~.:: .,. :
, :,. ~ :: .~ .:
~ .. . :
Claims (5)
1. A high-voltage, outdoor power line having damping devices that can be mounted to the stranded conductors of the power line to damp mechanical vibrations of the stranded conductor, each damping device comprising at least two vibration dampers, the spacing between two consecutive vibration dampers in the mounted state being smaller than half of the smallest anticipated wavelength of the mechanical vibration.
2. An outdoor power line as defined in claim 1, wherein said damping device has at least three vibration dampers mounted on the stranded conductor.
3. An outdoor power line as defined in claim 1, wherein a plurality of vibration dampers are mounted on the stranded conductor.
4. An outdoor power line as defined in claim 1, wherein said damping device is mounted at an end region of the stranded conductor.
5. In a method of constructing an outdoor power line as defined in claim 1, the step of mounting said damping device to the stranded conductor with the aid of a helicopter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4300657 | 1993-01-13 | ||
| DEP4300657.4 | 1993-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2113301A1 true CA2113301A1 (en) | 1994-07-14 |
Family
ID=6478082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002113301A Abandoned CA2113301A1 (en) | 1993-01-13 | 1994-01-12 | Outdoor power line having a damping device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5801329A (en) |
| CA (1) | CA2113301A1 (en) |
| DE (1) | DE4344537C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105336149A (en) * | 2015-11-27 | 2016-02-17 | 国网福建省电力有限公司 | Method for sending control instruction to line patrol unmanned aerial vehicle through power line carrier radiation |
| CN106571608A (en) * | 2016-08-01 | 2017-04-19 | 国网山西省电力公司大同供电公司 | Anti-resonance vibration device for high voltage transmission line |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2274402A1 (en) | 1999-06-11 | 2000-12-11 | Hydro-Quebec | Damper for an overhead cable |
| US6705440B2 (en) | 1999-08-23 | 2004-03-16 | Texas Tech University | Cable stay damper band and method of use for reduction of fluid induced cable vibrations |
| EP1212490A4 (en) * | 1999-08-23 | 2004-05-12 | Univ Texas Tech | Cable stay aerodynamic damper band and method of use |
| AU2725701A (en) * | 1999-12-16 | 2001-06-25 | Texas Tech University | Distributed aerodynamic and mechanical damping of cables with active smart control |
| US6877775B2 (en) * | 2002-05-09 | 2005-04-12 | Delphi Technologies, Inc. | Adaptive energy absorption system |
| US6774303B1 (en) | 2003-01-30 | 2004-08-10 | Pinnacle West Capital Corporation | Clamp for a vibration damper and method of installing same |
| CN100553835C (en) * | 2004-08-26 | 2009-10-28 | 新加坡科技研究局 | The equipment that is used for the ultrasonic vibration secondary process |
| RU2501138C2 (en) * | 2012-02-06 | 2013-12-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский авиационный институт (национальный исследовательский университет)" (МАИ) | Dampener of low-frequency oscillations in wires, cables and wire ropes |
| CN107121257B (en) * | 2017-06-01 | 2019-02-22 | 云南电网有限责任公司电力科学研究院 | A kind of wind tunnel test methods of bealock microrelief transmission pressure wind-induced vibration |
| CA3089112A1 (en) | 2018-01-22 | 2019-07-25 | Hubbell Incorporated | Self-seating damper clamp |
| CN111376039B (en) * | 2020-04-09 | 2021-10-08 | 云南电网有限责任公司电力科学研究院 | Bolt fastening device for vibration damper |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE551442C (en) * | 1930-03-23 | 1932-06-01 | Siemens Schuckertwerke Akt Ges | Arrangement of devices consisting of vibratory structures for damping the mechanical vibrations of overhead lines |
| DE565334C (en) * | 1932-11-29 | Siemens Schuckertwerke Akt Ges | Arrangement of devices consisting of vibratory structures for damping the mechanical vibrations of overhead lines | |
| NL29509C (en) * | 1930-03-23 | |||
| US1992538A (en) * | 1933-03-31 | 1935-02-26 | Aluminum Co Of America | Vibration damper |
| US2215541A (en) * | 1936-05-06 | 1940-09-24 | Gen Cable Corp | Torsional damper for line conductors |
| US3246073A (en) * | 1960-10-06 | 1966-04-12 | Bouche | Vibration damper for suspended outdoor wires |
| CH462267A (en) * | 1967-01-14 | 1968-09-15 | Salvi & Co Spa A | Vibration damper in suspended cables, particularly for power line conductors |
| US3941914A (en) * | 1974-05-31 | 1976-03-02 | The Furukawa Electric Co., Ltd. | Damper for an overhead transmission line |
| DE2942621A1 (en) * | 1979-10-22 | 1981-04-30 | Peter Prof. Dr. 6104 Seeheim - Jugenheim Hagedorn | Power line vibration damper - has cylinder attached tangentially to loop near support, containing static or active energy absorber |
| CA1151256A (en) * | 1980-01-24 | 1983-08-02 | Slater Steel Industries Limited | Subspan oscillation and aeolian vibration absorber for single and bundle conductors |
| DE3501757A1 (en) * | 1985-01-21 | 1986-07-24 | Bodo Dipl.-Ing. 8757 Karlstein Vogt | Vibration damper for electrical medium-voltage and high-voltage overhead lines |
-
1993
- 1993-12-24 DE DE4344537A patent/DE4344537C2/en not_active Expired - Fee Related
-
1994
- 1994-01-10 US US08/179,990 patent/US5801329A/en not_active Expired - Fee Related
- 1994-01-12 CA CA002113301A patent/CA2113301A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105336149A (en) * | 2015-11-27 | 2016-02-17 | 国网福建省电力有限公司 | Method for sending control instruction to line patrol unmanned aerial vehicle through power line carrier radiation |
| CN105336149B (en) * | 2015-11-27 | 2018-09-18 | 国网福建省电力有限公司 | A method of control instruction is sent by power carrier radiation direction patrol UAV |
| CN106571608A (en) * | 2016-08-01 | 2017-04-19 | 国网山西省电力公司大同供电公司 | Anti-resonance vibration device for high voltage transmission line |
| CN106571608B (en) * | 2016-08-01 | 2018-03-20 | 国网山西省电力公司大同供电公司 | Device is moved in a kind of high-tension electricity transmission line of electricity anti-resonance |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4344537A1 (en) | 1994-07-14 |
| DE4344537C2 (en) | 1995-10-05 |
| US5801329A (en) | 1998-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2113301A1 (en) | Outdoor power line having a damping device | |
| US3432610A (en) | Vibration dampers for suspended members | |
| US3260789A (en) | Bundled conductor spacer damper | |
| US2969416A (en) | Cable vibration damper | |
| US3885086A (en) | Spacer-damper assembly | |
| US3826339A (en) | Vibration damper for elongate members | |
| US5426555A (en) | Surge arrester arrangement | |
| US3992566A (en) | Aerodynamic aerial conductor vibration damper | |
| US3806627A (en) | Spacer-damper for bundle conductors | |
| US2172810A (en) | Reinforcement for transmission lines and the like | |
| US3052747A (en) | Aeolian vibration dampers | |
| US4527009A (en) | Vibration damper with motion limiting feature | |
| RU2249893C1 (en) | Ice and conductor vibration limiter for overhead power transmission lines | |
| WO1997007579A1 (en) | Suspension clamp for hanging the wires of high-voltage open cables on a support structure | |
| GB2068081A (en) | Vibration dampers of the stockbridge type | |
| US1965494A (en) | Cable dampener | |
| JPS6116750Y2 (en) | ||
| US3755613A (en) | Vibration resistor for overhead conductors | |
| KR101101909B1 (en) | Spacer damper and apparatus for fixing power transmission line | |
| JP3764021B2 (en) | Multi-conductor transmission line galloping prevention device | |
| CN212624970U (en) | Composite insulator | |
| FI75697B (en) | Electric arc shield | |
| US3454705A (en) | Spacer damper | |
| US3440328A (en) | Means for damping vibrations of power transmission lines | |
| WO1996002968A1 (en) | Spacer dampers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |